This
comes ahead of Tuesday's primary in which California, New Jersey, New
Mexico, Montana and South Dakota will hold elections. North Dakota
will also hold a caucus on Tuesday. The final primary will take the
following Tuesday, when DC residents will cast their vote.

A
candidate needs 2,383 delegates to secure the nomination.

Clinton's
competitor Vermont Senator Bernie Sanders has vowed to stay in the
race until the convention in July, hoping to win over support from
superdelegates.

The
wife of former President Bill Clinton, Hillary has served as a US
senator in New York and as secretary of state under President Barack
Obama. She lost a bitter presidential race to Obama in 2008.Her
presumptive nomination makes Clinton the first woman to be a
presidential nominee by a major political party in the United States.